First draft for some of the stuff done last evening

README.md

@@ -1,3 +1,86 @@
 # linux-on-desktop
 
 My journey to get Alpine + Wayland + River to work on ThinkPad T14 G3 AMD
+
+## Preparing hardware
+
+Disable secure boot and fn-lock in bios (so that F-keys work as F-keys by default and require Fn for their secondary multimedia functions).
+
+## Installing Alpine
+
+Follow https://wiki.alpinelinux.org/wiki/Installation
+
+Note that you will need to use Rufus; Ventoy does not work on this laptop (hangs after choosing the image).
+
+## Installing River
+
+In `/etc/apk/repositories`, uncomment TODO
+
+```
+doas apk update
+doas apk add eudev
+doas setup-udev
+doas apk add mesa-dri-gallium mesa-va-gallium
+doas apk add river river-doc mandoc
+doas apk add adwaita-icon-theme foot ttf-dejavu
+doas rc-update add seatd
+doas rc-service seatd start
+doas addgroup YOURUSER audio
+doas addgroup YOURUSER input
+doas addgroup YOURUSER seat
+doas addgroup YOURUSER video
+doas addgroup YOURUSER wheel
+install -Dm0755 /usr/share/doc/river/examples/init -t ~/.config/river
+```
+
+Also:
+```
+doas apk add xwayland
+```
+because the latest river in testing is built in a way that requires xwayland.
+
+Try to run with
+```
+XDG_RUNTIME_DIR=/tmp river
+```
+
+You should see the blue screen of river. Try to open terminal with Win+Shift+Enter. Try to exit with Win+Shift+E.
+
+### Installing Waybar
+
+```
+doas apk add waybar
+```
+
+and add startup section at the end of river init file (`~/.config/river/init`):
+
+```
+# startup
+riverctl spawn "waybar"
+```
+
+## Hardware
+
+### Backlight
+
+```
+doas apk add light
+doas nano /etc/udev/rules.d/backlight.rules
+```
+add the following lines into backlight.rules to make it possible for all users in video group (not just superusers) to control backlight:
+```
+ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="amdgpu_bl0", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness"
+ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="amdgpu_bl0", RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"
+```
+and then
+```
+doas rc-service udev restart
+```
+Backlight control with Fn+F5/F6 should work now.
+
+### Sound
+
+```
+doas apk add pamixer
+```
+TODO